<template>
  <el-menu
    default-active="2"
    class="el-menu-vertical-demo"
    @open="handleOpen"
    @close="handleClose"
    :collapse="isCollapse"
     background-color="#545c64"
      text-color="#fff"
      active-text-color="#ffd04b"
  >
  <h3> {{ isCollapse ?'后台':'通用后台管理系统' }} </h3>
    <el-menu-item @click="clickMenu(item)" :index="item.name" v-for="item in noChildren" :key="item.name" >
      <i :class="`el-icon-${item.icon}`"></i>
      <span slot="title">{{ item.label }}</span>
    </el-menu-item>
    <el-submenu  v-for="item in Children" :key="item.label" :index="item.label">
      <template slot="title">
        <i :class="`el-icon-${item.icon}`"></i>
        <span>{{ item.label }}</span>
      </template>
      <el-menu-item-group  v-for="subItem in item.children" :key="subItem.path">
        <el-menu-item :index="subItem.name" @click="clickMenu(subItem)">{{ subItem.name }}</el-menu-item>
      </el-menu-item-group>
    </el-submenu>
  </el-menu>
</template>

<script>

import Cookie from 'js-cookie';
export default {
  data() {
    return {
    };
  },
  methods: {
    handleOpen(key, keyPath) {
      console.log(key, keyPath);
    },
    handleClose(key, keyPath) {
      console.log(key, keyPath);
    },
    clickMenu(item){
        //当页面的路由和当前页面的路由不一致时才跳转
        //this.$route 表示的是 当前页面的路由
        if( this.$route.path !== item.path )
      {  //$router 表示的是整个router实例
       this.$router.push(item.path)
    }
    this.$store.commit('selectMenu',item)
    },
  },
  computed:{
    //没有子菜单
    noChildren(){
      return this.menuData.filter(item => !item.children)
    },
    //有子菜单
    Children (){
        return this.menuData.filter(item => item.children)
    },
    isCollapse(){
      return this.$store.state.tab.isCollapse
    },
    menuData(){
      //判断当前数据,如果缓存中没有应该从store中获取
      return JSON.parse(Cookie.get('menu')) || this.$store.state.tab.menu
    }
  },

};
</script >
<style lang="less" scoped>
.el-menu-vertical-demo:not(.el-menu--collapse){
    width: 200px;
    min-height: 400px;
}
.el-menu{
    height: 100vh;
    h3 {
        color:#fff;
        font-size: 16px;
        font-weight: 400;
    };
    border:none;
}
.el-container {
  line-height: normal; /* 重置行高，避免继承导致的间隙 */
}
.el-aside, .el-header {
  padding: 0 !important; /* 清除内边距 */
  margin: 0 !important;  /* 清除外边距 */
  border: none;          /* 清除可能的边框 */
}
.el-container > .el-container {
  display: flex;
  flex-direction: column;
  gap: 0; /* 关键：清除垂直方向的间隙 */
}
.el-aside{
    width: 200px;
}
</style>